diff --git a/src/sys/net/net/sys_arch.c b/src/sys/net/net/sys_arch.c
index a81a285..2809c5d 100644
--- a/src/sys/net/net/sys_arch.c
+++ b/src/sys/net/net/sys_arch.c
@@ -98,7 +98,7 @@
 static spinLock_t netThreadSpinlock = SPIN_LOCK_INITIALIZER;
 static struct sys_thread *threads = 0x0;
 
-struct sys_mbox *sys_mbox_new() {
+struct sys_mbox *sys_mbox_new_dead() {
   struct sys_mbox *mbox;
 
   mbox = kmalloc(sizeof(struct sys_mbox));
@@ -110,6 +110,15 @@
   return (mbox);
 }
 
+err_t sys_mbox_new(sys_mbox_t *mbox, int size) {
+  mbox->first = 0;
+  mbox->last = 0;
+  mbox->mail = sys_sem_new_(0);
+  mbox->mutex = sys_sem_new_(1);
+  ubthread_mutex_init(mbox->lock, NULL);
+  return (ERR_OK);
+}
+
 
 sys_thread_t sys_thread_new(const char *name, void (*thread)(void *arg), void *arg, int stacksize, int prio) {
   //void sys_thread_new(void (*function)(void), void *arg) {